Potassium clearly has 21 neutrons. Then the gas sample is cleaned of all unwanted gasses such as H 2 O, CO 2SO 2nitrogen and so on until all that remains are the inert gassesargon among them. The quickly cooled lavas that make nearly ideal samples for K—Ar dating also preserve a record of the direction and intensity of the local magnetic field as the sample cooled past the Curie temperature of iron. And this is a little bit redundant. So this is another layer of volcanic rock. So it won't necessarily seep out.
Potassium-argon (K-Ar) dating
Science Biology History of life on Earth Radiometric dating.
And this is a little bit redundant. National Nuclear Data Center. And you dig enough and you see a volcanic eruption, you see some volcanic rock right over there, and then you dig even more. At most it may have modified the framework a little.